package com.luyi.consumer.order.controller;


import com.luyi.consumer.api.entity.CommonResult;
import com.luyi.consumer.api.entity.Payment;
import com.luyi.consumer.order.lb.LoadBalance;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import javax.xml.ws.Service;
import java.net.URI;
import java.util.List;

/**
 * @author 卢意
 * @create 2020-10-20 20:34
 */
@RestController
@Slf4j
public class OrderController {

	//public static final String PAYMENT_URL="http://localhost:8001";
	public static final String PAYMENT_URL="http://CLOUD-PAYMENT-SERVICE";

	@Resource
	private RestTemplate restTemplate;

	@Resource
	private DiscoveryClient discoveryClient;

	@Resource
	private LoadBalance loadBalance;

	@GetMapping("/consumer/payment/create")
	public CommonResult<Payment> create(Payment payment){
		log.info("---order 调用 payment create方法");
		return restTemplate.postForObject(PAYMENT_URL+"/payment/create", payment, CommonResult.class);
	}

	@GetMapping("/consumer/payment/get/{id}")
	public CommonResult<Payment> getPayment(@PathVariable("id")Long id){
		log.info("----order 调用 payment get方法");
		return restTemplate.getForObject(PAYMENT_URL+"/payment/get/"+id, CommonResult.class);
	}

	@GetMapping("/consumer/payment/postEntity/create")
	public CommonResult<Payment> postEntityCreate(Payment payment){
		log.info("---order 调用 payment create ( postEntity)方法");
		return restTemplate.postForEntity(PAYMENT_URL+"/payment/create", payment,CommonResult.class).getBody();
	}

	@GetMapping("/consumer/payment/getForEntity/{id}")
	public CommonResult<Payment> getPaymentByGetForEntity(@PathVariable("id")Long id){
		log.info("----order 调用 payment get （getForEntity）方法");
		ResponseEntity<CommonResult> entity=restTemplate.getForEntity(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);
		if(entity.getStatusCode().is2xxSuccessful()){
			return entity.getBody();
		}else {
			return new CommonResult<>(444,"操作失败");
		}
	}

	@GetMapping(value = "/consumer/payment/lb")
	public String getPaymentLB(){
		//通过服务集群名称获取有效的服务器实例集合
		List<ServiceInstance> instances=discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");
		//判断服务器是否为空
		if(instances==null || instances.size()==0){
			return null;
		}
		//获得自己写得轮循算法得到的将要提供服务的服务器实例
		ServiceInstance serviceInstance= loadBalance.instance(instances);
		URI uri=serviceInstance.getUri();
		return restTemplate.getForObject(uri+"/payment/lb" ,String.class );
	}

	@GetMapping("/consumer/payment/zipkin")
	public String paymentZipkin(){
		String result =restTemplate.getForObject("http://localhost:8001"+"/payment/zipkin",String.class);
		return  result;
	}

}
